[root@percona01 ~]# cat /etc/my.cnf
[mysqld]
# Path to Galera library
wsrep_provider=/usr/lib64/libgalera_smm.so
# Cluster connection URL
wsrep_cluster_address=192.168.11.60
# In order for Galera to work correctly binlog format should be ROW
binlog_format=ROW
# MyISAM storage engine has only experimental support
default_storage_engine=InnoDB
# This changes how |InnoDB| autoincrement locks are managed and is a requirement for Galera
innodb_autoinc_lock_mode=2

Yes, the wsrep_cluster_address must start with gcomm://.
What is the 192.168.11.60 here? Is the node you are trying to start a first one?
Also, always the answer why starting mysqld failed is in the error log